Thank you, I’ll go through it now. As for the II through the walls, it is often not only BIS, but when the Creator puts the objects of entourage or other type of walls of the AI boxes, just trying to go around them in the battle regime, clips to the corners and in search of the path falls through the walls.
I often find such problem areas, inform the authors and fix it sometimes even unpacking the mission and expement myself.
Well, I'm in battle and you are waiting for me. I'll be back soon, I hope)

I know it took me some time, but I finally updated the mission. Single player experience should be easier and more enemies will spawn in multiplayer, depending on player count.

As for AI going through walls, mission takes place in vanilla location, not something made by hand, the issue should be non existent. AI will do its thing sometimes tho, its arma 3 after all.

If you ever decide to replay the mission I hope you will have a great time and would appreciate your feedback on that.

You have to give the VIP a Teamswitch so that the player can control survival...

VIP sometimes runs out into the street and there, of course, he dies

in your last 2 defense missions, often the enemy just walks through the walls directly towards the VIP or the player. I played without extra mods.
In general, these 2 missions are too difficult. It's impossible to survive at the veteran level... You have to make the right balance! Making impossible missions is too bad a trend...
I was able to pass it only from the 5th time and only 1 character from the squad survived. And the corpses are disappearing too fast. , weapons cannot be picked up.